Table 4.

Measurement result data of total indoor suspended dust particle in three departments by using RTDM.

Measurement Time	TSP, 1st Month (mg/m3), (N = 9 points, 4 days)	TSP, 4st Month (mg/m3), (N = 9 points, 4 days)	TSP, 7st Month (mg/m3), (N = 9 points, 4 days)	TSP, 10st Month (mg/m3), (N = 9 points, 4 days)	Inf.	p-Values
Department of Process Cement
30 min after working	1.066 ± 0.1	1.511 ± 0.3	1.409 ± 0.4	1.081 ± 0.1	< NAB	0.99
2 h after working	9.406 ± 2.5	9.441 ± 2.4	8.217 ± 3.4	8.527 ± 3.5	< NAB	0.95
4 h after working	13.959 ± 2.3	12.102 ± 2.1	13.048 ± 2.2	12.765 ± 2.4	> NAB	0.99
6 h after working	14.073 ± 1.3	9.239 ± 2.6	10.406 ± 1.4	9.328 ± 2.2	> NAB	0.91
6 h after working	0.939 ± 0.3	0.871 ± 1.0	1.895 ± 0.7	1.494 ± 0.4	< NAB	0.61
Average per day	7.889 ± 5.5	7.433 ± 4.9	6.995 ± 4.3	6.639 ± 4.3	< NAB	0.60
Department of Loam
30 min after working	0.567 ± 1.0	0.932 ± 0.5	1.817 ± 0.3	0.608 ± 0.5	< NAB	0.11
2 h after working	5.828 ± 2.7	9.097 ± 3.1	12.143 ± 2.4	11.725 ± 2.6	> NAB	0.56
4 h after working	9.477 ± 2.4	10.201 ± 1.6	10.400 ± 1.7	10.540 ± 3.1	> NAB	0.12
6 h after working	10.716 ± 3.9	9.775 ± 2.4	9.775 ± 3.2	8.050 ± 3.1	> NAB	0.79
6 h after working	1.902 ± 0.4	1.049 ± 0.3	1.555 ± 0.5	1.287 ± 0.6	< NAB	0.08
Average per day	5.698 ± 3.6	6.211 ± 4.2	7.138 ± 4.4	6.442 ± 4.4	< NAB	0.56
Department of Black Sand
30 min after working	0.860 ± 0.4	0.776 ± 0.5	1.293 ± 0.5	0.736 ± 0.7	< NAB	0.95
2 h after working	4.490 ± 3.3	6.097 ± 2.1	8.620 ± 1.2	7.027 ± 1.1	< NAB	0.36
4 h after working	9.327 ± 3.2	10.029 ± 2.5	10.327 ± 2.2	11.595 ± 2.2	> NAB	0.62
6 h after working	8.891 ± 2.1	8.295 ± 1.5	9.871 ± 2.6	9.322 ± 1.6	< NAB	0.22
6 h after working	0.980 ± 0.8	1.231 ± 0.5	2.231 ± 0.4	0.902 ± 0.3	< NAB	0.54
Average per day	4.910 ± 3.4	5.286 ± 3.4	6.468 ± 3.8	5.916 ± 4.1	< NAB	0.98

NAB: Threshold Value; TSP: Total Suspended Particle.